M a tftxtt i it



(No Model.)

J.FORSYTHE,

LAMP. No. 543,443. Patented July 23, 1895.

f "um $1 I I M j It ATTORNEYS,

UNIT D, STATES PAT NT OFFICE.

JAMES FORSYTHE, OF PITTSBURG, ASSIGNOR OF TWO-THIRDS TO WILLIAM L.NEWBAKER AND GEORGE A. JACKSON, OF WILKINSBURG, PENNSYL- VANIA.

LAMP.

SPECIFICATION forming part of Letters Patent No. 543,443, dated July23,1895.

Application filed May 17,1894. Serial No. 511,562. (No model.)

. provided with air-inlets and deflector devices.

so constructed asto prevent the lamp being blown out by the wind; and ithas primarily for its'object to provide a lamp of this character of asimple and inexpensive structure, having air-valve devices arranged topositively and effectively serve for their intended I 5 purposes.

It has also for its object to provide a lamp having air-valvedevicesconstructed to prevent the lamp from being smothered by becoming cloggedwith soot or by the condensa- 2o tions freezing in the bottom, andthereby closing off the air-holes.

The invention consists in the novel features of construction andpeculiar combination of parts hereinafter first described in detail and'2 5 then particularly pointed out in the appended claims, referencebeing had to the accompanying drawings, in which Figure 1 is aperspective view of. my improved lamp. Fig. 2 is a vertical sectiontaken practically on the line 2 2, Fig. 1. Fig. 3 isa horizontal sectiontaken on the line 3 3, Fig. 2.

, Fig. 4c is an inverted View of the top or hood section; and Fig. 5 isa perspective view, partly in section, of the lower or base portion.

In the accompanying drawings I have shown my improvement in the natureof a railroad signal-lamp; but I desire itunderstood that in theirpractical application the valve and air cut-off devices can be used onany 40 style of lamp or lantern requiring protection from the wind.

Referring to the accompanying drawings,

A indicates the outer casing of the lamp or lantern, which in thepreferred construction 5 is made cylindrical, as shown, and provided atone side with a bulls-eye B of the usual construction. At the loweredge, at points under the bulls-eye and diametrically opposite, theouter casing has screened air-inlets 5o 0 C, to the rear of which arearranged airchambers D, formed by the downwardly and inwardlyinclinedwalls d, having air-passages or openings (1 arranged in linewith the inlets O and the end walls 01 E indicates flapor swing valves,hung at the upper end of the walls (1, which are adapted to normallyhang down at the rear of the inlets O and to swing back to close offtheopenings d when forced back by the direct airpressure through the inletsO.

It will be noticed by reference to Fig. 3that the air-chambers areprojected at diametri cally-opposite points transversely to theprojection of the bulls-eye. To provide a convenient pocket orreceiving-chamber for the lamp, additional transverse air-spaces areformed over the spaces D, as shown at F, such Spaces having inner Wallsf, which extend entirely across the casing and the top portion f suchwalls f having airinlets f, as shown. 7o

In line with the lamp-pocket F the casing has an opening G, held closedby theslide G, and at the side opposite such opening the casing has aneye or bail portion g, whereby it is'adapted to be held on a'support,-italso having preferably a hand-bail H, as shown.

J indicates the top or hood portion of the lamp or lantern, which may befixedly connected with the body or detachably joined therewith by meansof a bayonet-joint and *Sospring catch K, as shown, and such hoodcomprises a neck portion L, (which slips over the neck or projection Aof the body,) which terminates in an outwardly-flared portion L,

provided with a series of air-passages Z. 8 5 v M indicates the topwhich fits over the flared portion L, the undervface of which'is formedinto an inverted-cone deflector M", which projects down into the flaredbody L, as shown.

N indicates an annular rim held pendent from the outer edge of the top Mand which has a series of air passages or openings '11, held in linewith the air-passages Z. It will be noticed by reference to Figs. 2 and4 that by 5 flaring the top outward, as at L, the side walls will beheld inclined similar to the ,walls d at the bottom, so as to form avalve-chamber 0 inside the rim N and such chamber, it will be noticed,is divided by radial partitions P, Ioc

whereby to form independent sections for each set of air-passages n andZ. In each of the valve-sections is pivoted a flap-valve Q,

'which is adapted to swing up against the in- It will also be observedthat by forming theseveral parts as shown such valves will be swunginward by air-blasts which blow upward under the rim N, (see' arrow 20,)the valves in the bottom being also hung to swing backward by suchupward air-blasts as may pass up through the bottom of the lampcasing,which enter through the supplemental inlets] which open into the spacesD.

R indicates the lamp, which may be of any ordinary construction, andseats in the way or recess formed by the side walls of the spaces F.

From the foregoing description, taken in connection with the drawings,it will be seen that by arranging the valve devices in the manner shown,no matter which way the wind blows, the air-passages to the windwardwill be held closed, while the others remain open, and by providing aninverted-cone-like deflector in the top the currents of air through thepassages will be deflected and not have a counteracting effect on eachother.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In a lamp or lantern as described, a hood portion, having its upperend flared outward, having a closed top, a pendent vertical annular rimsurrounding the flared portion, a series of division plates connectingsuch rim and flared portion, whereby to form a series of independentspaces, said rim and flared portions having coincident air openings, andflap valves hung one in each of such spaces, arranged to close over theopenings in the ,outer rim when the air enters from below and to swingback and close over the openings in the flaredportion when the windpressure is direct through the outer openings all substantially asdescribed and for the purposes specified.

2. In a lamp, a hood portion having an upper outwardly flared end havinga closed top,

having a pendent annular rim, whereby an annular space is formed,division. members forming such space into sections, coincident airpassages formed in the said rim and flared end, one set for eachsection, and a gravity or swing valve held in each of such sections, allarranged substantially as shown and described. I

3. As an improvement in lamps or lanterns substantially as described, abody portion having a neck member terminating with an outwardly flaredportion having a closed top, a vertical annular rim surrounding theflared portion, whereby an annular space open at the bottom is formed,said space being radially divided to form a series of chambers, said rimand annular portions having coincident air passages, and flap valveshinged to the inner face of the annular rim to close nor- ,mally overtheouter openings and be held thereover when the draft is from below, andadapted to be swung back by direct wind pressure, to close over theopenings in the flared portion of the hood all substantially as shownand for the purposes described.

4. In a lamp or lantern as described, acasing having a series ofinternal air spaces D having inclined walls d, the casing and wallshaving aligning air passages O and d respectively, hinged flap valvesheld in the said spaces to normally hang over the passages C, andopenings) in the bottom of the casing entering the spaces D and soarranged that air drafts therethrough will serve to keep the flap valvesover the passages O as and for the purposes specified.

5. The combination with the casing having a lamp holding seat portion orchamber at the bottom, having its side walls connected by a top portionf with the casing to form chambers F, the said side walls having airpassages f 01": air spaces D held within the spaces F, having theirinner walls (1 inclined and connected with the casing, said walls andthe casing having coincident air holes d and C respectively and the flapvalves E hinged in the chambers D to normally hang over the openingsGall arranged substantially as and for the purposes described. 7

- JAMES FORSYTHE.

WVitnesses:

J OHN W. Moons, GEO. A. J ACKSON.

